Tourists may call it Bangkok, locals may call it Bangkok, but the complete ceremonial name of the city of Bangkok is actually when it is written in Anglicised Pali / Sanskrit:
Krungthepmahanakhon Amonrattanakosin Mahintharayutthaya Mahadilokphop Noppharatratchathaniburirom Udomratchaniwetmahasathan Amonphimanawatansathit Sakkathattiyawitsanukamprasit
In English, Bangkok's full name is:
City of Angels, the residence city of the nine magnificent kings of incarnate gods built by Vishvakarman at Indra's behest.
While the ceremonial name is proudly displayed in places like the town hall and on official stationery, it's more than just a bite for informal conversations and the tourism industry.